From: Dave Airlie <airl...@redhat.com>
Signed-off-by: Dave Airlie <airl...@redhat.com>
---
src/amd/common/ac_nir_to_llvm.c | 18 +-----------------
1 file changed, 1 insertion(+), 17 deletions(-)
diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 0564dd1..b28812e 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -931,23 +931,7 @@ static LLVMValueRef emit_find_lsb(struct
nir_to_llvm_context *ctx,
static LLVMValueRef emit_ifind_msb(struct nir_to_llvm_context *ctx,
LLVMValueRef src0)
{
- LLVMValueRef msb = ac_emit_llvm_intrinsic(&ctx->ac,
"llvm.AMDGPU.flbit.i32",
- ctx->i32, &src0, 1,
- AC_FUNC_ATTR_READNONE);
-
- /* The HW returns the last bit index from MSB, but NIR wants
- * the index from LSB. Invert it by doing "31 - msb". */
- msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false),
- msb, "");
-
- LLVMValueRef all_ones = LLVMConstInt(ctx->i32, -1, true);
- LLVMValueRef cond = LLVMBuildOr(ctx->builder,
- LLVMBuildICmp(ctx->builder, LLVMIntEQ,
- src0, ctx->i32zero, ""),
- LLVMBuildICmp(ctx->builder, LLVMIntEQ,
- src0, all_ones, ""), "");
-
- return LLVMBuildSelect(ctx->builder, cond, all_ones, msb, "");
+ return ac_emit_imsb(&ctx->ac, src0, ctx->i32);
}
static LLVMValueRef emit_ufind_msb(struct nir_to_llvm_context *ctx,
--
2.7.4
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